CVE-2020-14372

 

Published at: - 03-03-2021 06:15

Last modified: - 22-07-2022 02:33

Total changes: - 6

Description

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://access.redhat.com/security/vulnerabilities/RHSB-2021-003
• https://bugzilla.redhat.com/show_bug.cgi?id=1873150
• https://security.netapp.com/advisory/ntap-20210416-0004/
• FEDORA-2021-cab258a413-Mailing List, Third Party Advisory
• GLSA-202104-05-Third Party Advisory

 

Keywords

NVD

 

CVE-2020-14372

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures